/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/Views/List/SObjectMixerEditorList.h
void SetTreeViewItemSelected ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [ISceneOutlinerTreeItem](API\Editor\SceneOutliner\ISceneOutlinerTreeItem) > Item, const bool bNewSelected )